involution

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Apart from age, family history, and age at menarche, two additional factors associated with breast cancer risk include mammographic breast density and extent of lobular involution.
This finding--that lobular involution constitutes a novel protective factor against breast cancer in young women with benign breast disease--is an important advance in the effort to better stratify breast cancer risk in the 1 million American women per year who under go a biopsy showing benign breast disease, Dr.
SAN ANTONIO--Young women with a benign breast biopsy showing complete lobular involution are at below-average risk of future breast cancer, according to a large prospective Mayo Clinic study.